Suppose that age hardening is possible in the Al-Mg system (see Figure12-10.)
(a) Recommend an following alloys; and artificial age-hardening heat treatment for each of the
(b) Compare the amount of the β precipitate that forms from your treatment of each alloy: (i) Al-4% Mg (ii) Al-6% Mg (iii) Al-12% Mg.
(c) Testing of the alloys after the heat treatment reveals that little strengthening occurs as a result of the heat treatment. Which of the requirements for age hardening is likely not satisfied?